Forts
Fortification
-1
Section::::History.

Military engineering
100034
Fortification
Semipermanent fortification
Fortresses
Fortalice
Fieldworks (military)
Military fort
Semipermanent fortifications
Defensive works
Strongholds
Earthworks (military)
Fortalices
Military earthworks
Military fieldwork
Fortifications
-1
Section::::History.

Military engineering
100034
Fortifications
Fortress
Military fortifications
Earthworks (fortification)
Fort
-1
Section::::History.

Military engineering
100034
Fort
Stronghold
Field fortification
Fortified
Stronghold (structure)
Military fortification
Fieldworks
-1
Section::::History.

Military engineering
100034
Fieldworks
Festungen
Permanent fortification
Horn works
Fieldwork (military)
Permanent fortifications
Earthwork (military)
fieldworks
fortalices
permanent fortification
stronghold
military fort
strongholds
stronghold structure
defensive works
earthwork military
fortification
permanent fortifications
field fortification
fortress
fieldwork military
semipermanent fortification
fortified
earthworks military
fort
fieldworks military
earthworks fortification
festungen
military fortification
military fortifications
forts
fortifications
fortresses
military earthworks
horn works
military fieldwork
fortalice
semipermanent fortifications